about 80% of Thailand buildings have TWO holes in the 220VAC wall sockets
and ONLY TWO HOLES. One side is definitely hot and the other side is
definitely neutral. The pin sockets, the holes, are not marked and not
keyed in any way. There is NO GROUND present by any means...no wire
ground, no BX cable nor conduit.
When you state that one pin is neutral and at the same time state there's no
marking on which pin is neutral, that leads me to ask a couple questions
about electrical distribution In Thailand:
1) Is the receptacle keyed in any way to ensure proper hot and neutral with
mating plug connections?;
2) Is the neutral absolutely floating above all grounded and grounding
conductors (e.g, a water pipe or water-fed room radiator)? That of course
assumes piping is even grounded in Thailand. Or, is neutral simply a
floating return for the hot (which in reality would make it another hot
conductor). Even though the receptacle has no ground reference, is neutral
grounded/earthed at the service entrance or at some point upstream from the
utility provider?
Mr. Parascondola's first message about the presence of voltage inside
some Ameritron amplifiers, he seemed to say that it did matter which side
of the hot and neutral of the two-wire supply 220ACV was connected to the
amplifier AC input.
Specifically, what Ameritron models are affected by this as I would like to
study the schematic(s).
Paul, W9AC
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